Ask away - I think all anyone is asking is that people try and self-help as much as possible in advance as you'lll learn more if you figure it out for yourself.
If it still doesn't make sense - and let's face it - it was relatively easy 35 years ago when I was where you are now - then put your problems up here, bearing in mind the question may have been answered a few times already - and a quick check of the search function takes care of that.